Earnings per Share Earnings per Share (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Common Stock, Shares, Outstanding	10,939,486				8,755,398				10,939,486	8,755,398	8,676,849	8,573,744
Weighted Average Number of Shares Outstanding, Basic									8,763,000	8,610,000	8,532,000
Diluted (in shares)									8,900,000	8,720,000	8,633,000
Basic (in dollars per share)	$ 0.16	$ 0.69	$ 0.48	$ 0.22	$ 0.21	$ 0.43	$ 0.41	$ 0.26	$ 1.55	$ 1.31	$ 1.14
Incremental Common Shares Attributal To Share Based Payements Arrangements									$ 0.02	$ 0.02	$ 0.01
Diluted (in dollars per share)	$ 0.16	$ 0.67	$ 0.47	$ 0.22	$ 210.00	$ 0.42	$ 0.40	$ 0.26	$ 1.53	$ 1.29	$ 1.13